feat: chage minimumReleaseAgeBehaviour to strict (#36)

Reviewed-on: #36
Co-authored-by: t.behrendt <t.behrendt@t00n.de>
Co-committed-by: t.behrendt <t.behrendt@t00n.de>

common.json

@@ -7,7 +7,7 @@
     {
       "description": "Don't update dependencies unless they are at least 7 days old",
       "minimumReleaseAge": "7 days",
-      "minimumReleaseAgeBehaviour": "timestamp-optional",
+      "minimumReleaseAgeBehaviour": "timestamp-required",
       "internalChecksFilter": "strict"
     },
     {